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Unit 9420

Formed in 1942 to support the Japanese Southern Army, Unit 9420 or Oka Unit consisted of two units: the Umeoka Unit specialising in the plague, and the Kono Unit specialising in malaria.

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Commanded by Major General Kitagawa Masataka the Unit was head quartered in the Raffles Medical University in Singapore, with some evidence that it also had sub-units operating in Thailand and working on unknown diseases. Coupled to its work on the plague the unit was also responsible for rat catching.

References

David K. Japan's dark background 1881-1945: Singapore- Headquarters of the Oka Unit (Unit 9420) [4 July] 2000

Imperial Japanese Army special research units
Unit 100 (Shenyang) \| Unit 516 (Qiqihar) \| Unit 543 (Hailar) \| Unit 731 (Pingfang) / Unit 200 (Manchuria) / Unit 8604 or Nami Unit (Guangzhou) \| Unit 773 (Songo) \| Unit Ei 1644 (Nanjing) \| Unit 1855 (Nanjing) \| Unit 2646 or Unit 80 (Hailar) \| Unit 9420 or Oka Unit (Singapore)